Road paver



R. L. GREIST Feb. 21, 1928.

ROAD PAVER Filed Feb. '7, 1927 3 Sheets-Sheet 3 Patented Feb. 2.1-, 192s. y

UNITE-o, YSTATES ,MineurA OFFICE.

RAYMOND L. Genaisse, OF CHICAGO, ILLINOIs, esercito?. 'ro LEACII" COmrANY, OF e CHICAGO, ILLINOIS, A com?Onnfrroiy.OF` wIsCONsIN.

ROAD neven.

Appueaaenmea February 7;. inea serial No. wam.

The present invention has to do with road paving machines of the boom and Y.bucket type, and is particularly concerned with the manncrin which the movement of the distributing bucket is controlled.

The principal 'object of the invention is to provide,.in a paver of the type described, improved means for automatically causing the bucket, when moving inwardly along the boom, to stop `in a position beneath the delivery chute of the mixing drum.

Other objectsand advantages of the invention will be evident to those skilled in the art upon a full understanding ofl the construction, Varrangement and operation of the improved mechanism.

In order that the invention may be readily understood, one embodiment of the same is herein illustrated and described, but it will be appreciated of course that such embodi-` ment is presented merely for the purpose of eXempliication and is not intended to restrict the spirit of the invention short of its true scope as defined inl the claims.

In the drawings: .i

Fig. 1 is a side view of a paver equipped with the improved mechanism of the invention;

. Fig. 2 is a partially sectioned planview of the mechanlsm, as viewed from the line 2 2 of Fig. i. I

Fig. 3 is a side view of the upper portion' of the mechanism;

Fig. 4 is an end viewof the upper portion of the mechanism; Fig. 5 is a vertical section vthrough the boom, taken on the line 5-.5 of Fig. l; and Fig. 6 is another vertical section through the boom, taken on the line 6 6 of Fig.` 5. The paver illustrated in the drawings includes a main frame 10, a mixing drum 11 journaled for rotation in the frame, a discharge chute 12 for the drum, a boom 13 ivotally connected near one end to a bracket 5 14 projecting from the frame, and a distributing bucket 15 supported b the boom and movable lengthwise thereo The bucket 15 is pulled outwardly along the boom by a cable 16, and is pulled inwardly along the boom by a cable 17, the two cables being secured in any suitable manner to a carriage 18 from which the bucket is suspended. The cable 16 extends outwardly from the carriage about a sheave 19 which es is journaled in the outer end of the boom,

then inwardly about a sheave 20 which is journaled in theinner end of the boom,then upwardly about a sheave 21 which is journaled in the'upper portion of the frame 10, and then downwardly Vto a drum 22, about which drumit is wound. The cable 17 extends inwardly from the carriage about a sheave 23 which is journaledl in the inner end of the Vboom at one side of the sheave 20, then upwardly alongside thecable 16 about I asheave 24 `which is journaled` in the upper portion ofthey frame l0 at one side of the sheave 21, and then downwardly to the drum 22, about which drum it is wound in a direction opposite to that in which the cable 16 is wound. e

The drum 22, which is clearly shown in Fig. 2, is keyed to a shaft 25, and two gears 2.6i` and 27 are journaled onthe shaft `25 at opposite sides off the drum. The gear 2G is rotated continuously in one direction by a gear 28 which meshes with the same and is connected with a source of power, and the gear 27 is rotated continnouslyin the opposite direction by a gear 29 which meshes Awith the same and is connected with the Same source of power as the gear 28 but in auch a way as to rotatein the opposite direction. e y The Aear 26 may be clutched to the shaft 25 by sifting a pivoted yoke 30 toward the gear, which movement causes the gear to be clamped frictionally between twoI relatively movable clutch elements 31, one of which is connected to the yoke, and. the other of which is keyed to the shaft. The gear 27 maybe clutched to the shaft in a similar manner by shifting a ivoted`yoke32 toward the ear 27, which yo Ie is connected with` a simi ar `clutch mechanism in association with that gear. e

The free ends of theyokes 30` and 32 are pivotally connected to a cross rod 33 which is arranved adjacent the frame 1Q in parallel relation to the shaft 25, and the rod 33 may be shifted by a hand lever 34 to operate the two clutch mechanisms in unison. vWhen the rod 33 is in a central or neutral position, both of the gears 26 and 27 will rotate freely relative to the shaft 25 and the drum 22 will be stationary. When the rod is shifted in one direction from the neutral position, as is the case inFig. 2, the gear 26 will rotate free] relative to the shaft, but the gear 27 `will e' clutched to the shaft and the drum llt) will rotate in a direction to wind up the cable 17 and move the bucket toward the inner end of the boom. When the rod is shifted inthe opposite direction from the neutral position, the gear 27 will rotate freely relative to the shaft but the gear 26 will be clutched'to the shaft and the drum will rotate in a direction to wind up the cable 16 and move the bucket toward the outer end of the boom.

The present invention resides in the improved clutch knockout device hereinafter described, which device is so designed as to function properly ir'espective of the position to which the boom is swung or tilted relativeto the frame of the machine.

A shaft 35 is arranged above the drum22 at right angles to the rod 33, and is journaled for rocking movement in two brackets 36 and 37. A forked lever 38 entends horizontally from the outer end of the shaft 35 to a point a iproximately in alignment of the pivotal axis of the boom, and the irl-pulling cable 17 travels freely up and down in the slot 39 in the end of the lever. Another forked lever 4() entends downwardly from the inner end of the shaft 35, and the rod 33 which is connected with both of the clutch mechanisms passes through the slot Ll1 in the end of the lever. A collar l2 is secured to the rod 33 adjacent the lower end of the lever 40, and, when the lever 4() is rocked by a corresponding movement, ofthe lever 38, the lever l0 will bear against the collar 42 and will shift the rod into a position wherein both of the clutch mechanisms asso ciated with the gears 26 and 27 are disconnected. y y

A contact member 43 is secured to the inpulling cable 17 at a point thereon where itA will reach the forked lever 38 at the time the bucket reaches the end of its inward movement, and, when the bucket does reach that position, the member i3 will ride upwardly into engagement with they slotted end of the lever 38, causing the lever 88 to oscillate, the shaft 35 to rock, and the lever 40 to voscillate and'shift both of the clutch mechanisms into neutral positions, thus bringing the bucket automatically to rest in the desired position beneath the discharge chute.

The contactl member 43 is shown inthe drawings as a rounded lug which is adjust ably secured to the cable, but the member obviously may assume any one of many other different forms.

The sheave 23 about which the contact member must travel with the cable`17, is of special construction to accommodate the member, see Figs. 5 and 6, being quite wide between Vflanges and having a central cable groove.

l claim:

l. ln a paver, a boom, a bucket movable along the boom, a cable attached to the bucket, a drum for winding upthe cable and causing the bucket to move along the boom, a power source for rotating the drum, a clutch connecting the power source withthe drum, and means associated with the cable for operating the clutch and causing the drum to be disconnected from the power source automatically when the bucket reaches a predetermined position on the boom.

f2. ln apaver, a boom, abucket movable along the boom, a cable attached to the bucket, a drum for winding up the cable and causing the bucket to move along the boom, a power source for rotating the drum, a clutch connecting the power source with the drum, a lever for operating the clutch, and a contact member secured to the cablerfor engaging with and shifting the lever whereby to operate the clutch and cause the drum to be disconnected from the power source au tematically -when the bucket reaches a pre determined position on theboom.

3. ln a paver, a boom, a bucket movable along the boom, a cable attached to the bucket, a drum for winding up the cable anc causing the bucket to move along the boom, a powerA source for rotating the drum, a clutch connecting the power source with the drum, a vlever for operating the clutch having a forked end through whichthe cable passes, and a lug cured to the cable for cngaging with and shifting the forked end oil the lever whereby to operate the clutch and cause the drum to be disconnected from the power source automatically when the bucket reaches a predetermined position on thel boom. i

ln testimony whereof I have hereunto subscribed my name.

RAYMUND L.v REISTE 

